Please mark all nouns in the text. To mark a word, click on the word in the text. The word will become <span class="selected">hightlighted</span>. If you made a mistake, simply click again.<br/>
For example:<br/><br/>
<span class="selected">Wikipedia</span> is a free, web-based, collaborative, multilingual <span class="selected">encyclopedia</span> supported by the non-profit <span class="selected">Wikimedia Foundation</span>.
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